Wrinkle tube for piping work



FIG. 1 is a front perspective view of the wrinkle tube for piping work showing new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a cross-sectional view taken along the line 4-4 of FIG. 2;

FIG. 5 is a cross-sectional view thereof shown in a position of use with tightening nut and packing for sealing; and,

FIG. 6 is an enlarged view of the portion within the circle line of FIG. 4.

The broken lines shown in the drawings are for the purpose of illustrating environment only that form no part of the claim. The dot dash broken line indicates cutoff boundaries for enlarged detailed portion views and form no part of the claim. 

CLAIM The ornamental design for a wrinkle tube for piping work, as shown and described. 